What is the CVSS score of CVE-2026-22774?

CVE-2026-22774 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Devalue are affected by CVE-2026-22774?

Organizations using Svelte devalue face notable risk from CVE-2026-22774 rated CVSS 7.5. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2026-22774?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Vendor patch is available.

Devalue CVE-2026-22774

HIGH

Asymmetric Resource Consumption (Amplification) (CWE-405)

2026-01-15 security-advisories@github.com

GHSA-vw5p-8cq8-m7mv

Denial Of Service Devalue

7.5

CVSS 3.1 · Vendor: github

Severity by source

Vendor (github) PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Red Hat

7.5 HIGH

qualitative

Primary rating from Vendor (github).

CVSS VectorVendor: github

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

Patch released

Jan 20, 2026 - 15:28 nvd

Patch available

CVE Published

Jan 15, 2026 - 19:16 nvd

HIGH 7.5

DescriptionCVE.org

Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From 5.3.0 to 5.6.1, certain inputs can cause devalue.parse to consume excessive CPU time and/or memory, potentially leading to denial of service in systems that parse input from untrusted sources. This affects applications using devalue.parse on externally-supplied data. The root cause is the typed array hydration expecting an ArrayBuffer as input, but not checking the assumption before creating the typed array. This vulnerability is fixed in 5.6.2.

AnalysisAI

Denial of service in Svelte devalue versions 5.3.0 through 5.6.1 allows remote attackers to exhaust CPU and memory resources by supplying malformed input to the parse function, affecting applications that process untrusted data. The vulnerability stems from insufficient validation of typed array inputs before hydration, enabling attackers to trigger excessive resource consumption. Update to version 5.6.2 or later to remediate.

Technical ContextAI

Affects Devalue. Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From 5.3.0 to 5.6.1, certain inputs can cause devalue.parse to consume excessive CPU time and/or memory, potentially leading to denial of service in systems that parse input from untrusted sources. This affects applications using devalue.parse on externally-supplied data. The root cause is the typed array hydration expecting an ArrayBuffer as input, but not checking the as